40results about How to "Reduced current demand" patented technology

Disclosed herein is an improved high-efficiency solar-charging electric window candle comprising a base adapted to sit securely upon a window sill. The base includes a footer formed with a battery compartment accessible through a bottom hatch, and a riser protruding upwardly from the footer with upwardly inclined side surfaces. The riser also has a compartment for enclosing a circuit board, and a vertically-oriented collar. A rechargeable battery is mounted in the footer of said base, and a hollow cylindrical candle body is inserted in the collar of the base riser, and a bulb assembly comprising a white LED is mounted atop the candle body. A circuit board is enclosed in the riser and includes two circuits: a current pump for supplying a pulsed current, and a photosensing circuit for sensing ambient light levels. The charge pump circuit reduces current requirements of the white LED, and the photosensing circuit automatically detects ambient light levels and illuminates the white LED while disconnecting the rechargeable battery, or vice versa, depending on whether there is sufficient ambient light.

The invention discloses an IGBT overvoltage protection circuit and an IGBT overvoltage protection method. The IGBT overvoltage protection circuit comprises an IGBT, a driving source, a collector electrode overvoltage protection circuit and a driving control circuit, wherein the driving source is connected with the gate electrode of the IGBT; the collector electrode overvoltage protection circuit is used for monitoring the voltage of the collector electrode of the IGBT, transmitting overvoltage signals to the driving control circuit when the voltage of the collector electrode of the IGBT exceeds a predefined value, and transmitting current to ensure that the potential of the gate electrode of the IGBT is increased to restrain the rising of the voltage of the collector electrode of the IGBT; the driving control circuit stops the turn-off of the IGBT when receiving the overvoltage signals. As the IGBT overvoltage protection circuit controls the turn-off of the IGBT through the driving control circuit while performing overvoltage protection, so that the requirement on charge current of the gate electrode of the IGBT is small, the response time of overvoltage protection is greatly shortened, and the IGBT can be protected more timely.

A switching system and control method therefor are provided and implemented with a fuel cell stack system. The switching system enables fuel cell stacks to be connected in series for providing power to a power user while removing the particular disadvantages of a series circuit. In the event of a stack fault, the faulty stack may be bypassed, whereby the remaining stacks provide power to the power user at reduced capacity. The stack is continuously monitored and is reintroduced to the series circuit if the fault clears. If the fault reoccurs a predetermined number of times after the stack has been reintroduced, a “reduced capacity” mode is initiated. Additionally, in the event of a reduced or an increased current demand, stacks are selectively switched in and out of the series connection, for limiting the overall operation voltage range of the fuel cell stack system.

The invention discloses a linear motor device and a magnetic suspension train; the linear motor device comprises a linear motor rotor (1), a stator winding (2) and a stator, wherein the stator comprises a composite structure formed by a hollow stator (3) and an iron core stator (4); the hollow stator (3) is used for providing forward driving force; and the iron core stator (4) is used for providing forward driving force and upward normal suction force. According to the scheme, the problem that an existing iron core linear motor is too high in normal suction force and is difficult to adjust, and the problem that the reliability is low due to the fact that the normal suction force of the iron-core-free linear motor is too small can be solved, and the effect of improving the reliability is achieved.

The invention relates to a magnetic levitation vehicle (11) and to a method for lifting said magnetic levitation vehicle (11) and to lowering said magnetic levitation vehicle onto a roadway. According to the invention, the carrier magnetic units (38) of the magnetic levitation vehicle (11) are not all activated or deactivated at the same time but at different times in order to keep the current energy requirement from an external energy supply or main power supply to a minimum.

A separating device has a separating channel, through which a suspension can flow, a ferromagnetic yoke arranged on one side of the separating channel and a separating element arranged at the outlet of the separating channel for separating magnetic or magnetizable particles in the suspension. A plurality of coils arranged along the separating channel are controlled by a control device to produce a magnetic deflection field. The control device produces alternating current directions for controlling neighboring coils.

This invention relates to a method for closing the vehicle door and the trunk cover through at least a locking member and a matching locking device. The locking device can be electromechanically locked and unlocked. The relative movement between two locking members enables the vehicle door to be locked when the vehicle door is away from the vehicle in certain distance. In an locking state, the vehicle door is spaced in smaller distance with the vehicle than the distance in a medium state, and the locking state can be switched to the medium state in order to open the vehicle door. According to the invention, when the environment data is reached or gone through or/ and at least one limit value of the state data of the vehicle is reached, at least one locking member of the locking device is control to move relatively, which enables the vehicle door to be switched from one locking state to another locking state. In another locking state, the distance between the vehicle door and the vehicle body is smaller than the distance in the locking state.

The invention relates to a method for operating an electric fuel pump, specifically a method for operating the electric fuel pump of an injection device, wherein a maximum limit value (48) is preset for a voltage applied to the electric fuel pump, a maximum limit value (62) is preset for a current flowing through the electrical fuel pump, a value (62) of a required current of the electric fuel pump is measured, and in which, in the event that the measured value (62) of the current is above the preset maximum limit (64), the maximum limit value (48) preset for the voltage applied to the electric fuel pump power depending on the measured value (62) of the current is reduced.

The invention relates to a tool (1) for machine-cutting a workpiece (2), having a fastening means (4) for fastening the tool (1) in a rotatably driven tool spindle (6) of a machine tool (8), a tool casing (12), which runs at least partially around a tool centre axis (10), and a set of teeth (14), which runs at least partially around the tool centre axis (10) and is arranged on the side of the tool casing (12) that faces away from the fastening means (4). According to the invention, the tool (1) has at least one, preferably a plurality of recesses (16), which extend from the set of teeth (14) into the tool casing (12).

The invention belongs to the field of wallpaper, and particularly relates to graphene-based wallpaper. The graphene-based wallpaper includes a graphene resistance layer and a thermally-conductive purification layer; a formula of the graphene resistance layer comprises the following components: 30-50 parts of graphene, 10-15 parts of a PVC material, 5-8 parts of ethyl cellulose, and 30-50 parts ofabsolute ethanol; and a formula of the thermally-conductive purification layer comprises the following components: 10-20 parts of tourmaline powder, 20-30 parts of thermal conductive silicone, 10-15 parts of nano-aluminum oxide, 5-8 parts of methylcellulose, and 20-40 parts of distilled water. The graphene-based wallpaper solves the gap of current wallpaper in environmental protection heating, andthe wallpaper with a micro-current heating effect and a negative ion purification function is formed through a combination of the graphene resistance layer and the thermally-conductive purification layer.

The invention discloses a charging method of a battery charging unit. The charging method of the battery charging unit comprises the following steps that a request of a first current flowing in through a power distribution line is received from a first battery charging unit through a control module, the control module has access to position data information of the position of the first battery charging unit in the power distribution line, and displays the position data information, and the control module generates instruction information indicating that the request is accepted or rejected for the first battery charging unit. The invention further discloses the control module of the battery charging unit and the battery charging unit. According to the charging method of the battery charging unit, the control module of the battery charging unit and the battery charging unit, charging can be carried out batteries of vehicles such as electric vehicles through existing power supply infrastructure, the utilization rate of lighting networks is improved, and the requirement of the lighting networks for currents is greatly reduced.

A laser diode bar: includes a semiconductor substrate comprising a first semiconductor layer of a first conductivity type; a first laser diode stack on an upper side of the semiconductor layer; a second laser diode stack on the upper side of the semiconductor layer, the second laser diode stack being electrically connected in series with the first laser diode stack, in which an electrical conductivity of the first semiconductor layer of the first conductivity type is higher than an electrical conductivity of each semiconductor layer of the first and second laser diode stacks; and a first electrode layer on the first laser diode stack, in which the first electrode layer electrically connects the first laser diode stack to a portion of the first semiconductor layer of the first conductivitytype that is between the first laser diode stack and the second laser diode stack.

The invention discloses a power supply device for an electromagnetic induction module of an electromagnetic liquid crystal touch screen, belonging to periphery equipment of computers. Without changing the function of the touch screen, the current requirement of the electromagnetic induction module for the computer is lowered to below 1mA. The working current of the electromagnetic induction module is not directly supplied by a USB interface of the computer again but supplied by a power module of the touch screen. A voltage conversion circuit and a switch circuit are connected between the power module and the electromagnetic induction module and are respectively connected with the USB interface of the computer. A power end of the USB is connected with a control port and a power input end of the switch circuit. An output port of the voltage conversion circuit is connected with an input port and a power input end of the switch circuit. By adopting the device, after the working current of the electromagnetic induction module is supplied by the power module of the touch screen, the output current of the USB interface of the computer is greatly lowered, thereby avoiding the aging of a USB controller of the computer.

A bidirectional crosspoint switch interface employs a pair of backward-connected transimpedance amplifiers of the type disclosed in the U.S. Patent to L. Enriquez, U.S. Pat. No. 6,411,163, and associated scaling current mirrors that drive nodes of associated reverse signal cancellation circuits. The reverse signal cancellation circuits are coupled to respective pairs of ports of the crosspoint switch and input and output ports of 1:1 current mirrors, in a manner that affords bidirectional buffering between the crosspoint switch and a pair of bidirectional signaling ports that terminate respective signaling links, without signal reflections.

Tool head (1) for a lathe (2), comprising a tool holder (5) retaining a machining tool (3), the tool head (1) being equipped with at least one actuator (6) for creating an additional movement of the tool holder (5) in the form of an oscillating swiveling movement about at least one swivel pin (7). An associated method for machining a workpiece as well as an associated lathe are also disclosed.

The invention provides a power battery pack control method and a power battery pack, and the power battery pack control method comprises the steps: obtaining the power supply capability of a first battery pack and a second battery pack which are connected in parallel, the power supply capability comprising residual capacity and on-load voltage; according to the power supply capacity, a main discharge pack and an auxiliary discharge pack in the first battery pack and the second battery pack are determined, and the main discharge pack is suitable for supplying power to a load independently or supplying power to the load together with the auxiliary discharge pack; and when the auxiliary discharge pack supplies power to the load together, controlling the discharge current of the auxiliary discharge pack to be increased from low discharge current to high discharge current. The method has the beneficial effect that the discharging efficiency of the battery pack can be improved.